Have you tuned the JVM parameter of hbase ? If you have Ganglia, did you observe high variation in network latency on the 6 nodes ?
HBase 0.92.2 has been released. Do you plan to upgrade to 0.92.2 or 0.94.3 ? Cheers On Mon, Jan 7, 2013 at 9:38 PM, Farrokh Shahriari < mohandes.zebeleh...@gmail.com> wrote: > Hi again, > I'm using HBase 0.92.1-cdh4.0.0. > I have two server machine with 48Gb RAM,12 physical core & 24 logical core > that contain 12 nodes(6 nodes on each server). Each node has 8Gb RAM & 2 > VCPU. > I've set some parameter that get better result like set WAL=off on put,but > some parameters like Heap-size,Deferred log flush don't help me. > Beside that I have another question,why each time I've run mapreduce,I've > got different result time while all the config & hardware are same & not > change ? > > Tnx you guys > > On Tue, Jan 8, 2013 at 8:42 AM, Ted Yu <yuzhih...@gmail.com> wrote: > > > Have you read through http://hbase.apache.org/book.html#performance ? > > > > What version of HBase are you using ? > > > > Cheers > > > > On Mon, Jan 7, 2013 at 9:05 PM, Farrokh Shahriari < > > mohandes.zebeleh...@gmail.com> wrote: > > > > > Hi there > > > I have a cluster with 12 nodes that each of them has 2 core of CPU. > Now,I > > > want insert large data about 2Gb in 80 sec ( or 6Gb in 240sec ). I've > > used > > > Map-Reduce over hbase,but I can't achieve proper result . > > > I'd be glad if you tell me what I can do to get better result or which > > > parameters should I config or tune to improve Map-Reduce/Hbase > > performance > > > ? > > > > > > Tnx > > > > > >
